<html>
  <head>
    <style>
        html,body,div{
          margin: 0;
          padding: 0;
        }
        .input{
          width: 300px;
          height:40px;
        }
      </style>
  </head>
  <body>
    <div class="container"> 
      <input type="text" class="input">
    </div>
    
  </body>
</html>
